Comb-cutting machine.



No. $49,875. Patented May l5, I900; H. H. PREDMURE.

60MB CUTTING MACHINE.

(Application filed Dec. 27, 1898.)

(No Model.) 5 Sheets-Sheet I.

Patented May !5, I900.

v H. H. PREDMORE.

60MB CUTTING MACHINE.

(Application filed Dec. 27, 1898.) (No Model.) 5 Sheats-Sheet 2.

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" JZW67ZZ%/T7 No. fi l-9,875. Patented May l5, I900. H. H. PREDMURE.

60MB CUTTING MACHINE.

(Application fllad Dec. 27, 1698.) (No Model.)

5 sheets-sheet 3.

HUI W? x U I No. 649,375. Patented May I5, I900. H. H. PREDMOBE.

COMB CUTTING MACHINE.

(Application filed Dec. 27. 1898.)

(No Model.) 5 Sheets-Sheet 4.

No. 649,875. Patented May l5, I900. H. H. PREDMORE.

00MB CUTTING MACHINE.

(Application filed Dec. 27, 189B.)

5 Sheets-8heet 5.

(No Model.)

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UNlTlFJU STATES HARVEY II. PREDMORE, OF CHICAGO, ILLINOIS, ASSIGNOR TOTHE MANI- TOIVOC ALUMINUM NOVELTY COMPANY, OF MANITOWOC, WISCONSIN.

COMB CUTTING MACHINE.

SPECIFICATION forming part Of Letters Patent No. 649,875, dated May 15,1900.

Application filed December 27, 1898. Serial No. 700,443. (No model.)

To rtZZ whom it may concern.-

Be it known that I, HARVEY H. PREDMORE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Comb-Cutting Machines;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in tothe art to which it appertains to make and use the same.

The present invention has relation to that class of machines employed inthe making of combs. The working of the machine is anr 5 tomatic, and itis adapted to cut the coarse and fine teeth at one operation, thussaving much time and greatly increasing the daily production.

Figure 1 is a horizontal plan section of a machine embodying theimproved features. Fig. 2 is a broken-away elevation and part section online 2, Fig. 1, looking in the direction indicated by the arrow. Fig. 3is an end elevation and part section on line 3, Fig. 1,

2 5 portions of the frame being broken away. Fig. t is an elevation ofthe opposite end with parts of the frame broken away. Fig. 5 is an endelevation and part section of a work-holding drum on line 5, Fig. 1,showing the arrangement of the comb-blank sections and the relativeposition of the cutting mechanism. Fig. 6 is a broken-away sectionaldetail of the work-holding drum. Fig. 7 is a longitudinal section online 7, Fig. 1. Fig.

5 8 is a sectional detail on line 8, Fig. 7. Fig.

9 is a transverse section on line 9, Fig. 8. Fig.

10 shows a comb blank; Fig. 11, the finished product; and Fig. 12 is abroken-away sectional detail on line 12, Figs. 1 and 2.

A represents the main supporting-frame, which may be of any desired formbest adapted for the purpose. A driving or drum shaft B is providedwit-h j ournal-bearings a o. and has the work-holding drum C rigidlymounted thereon and rotating therewith in bringing the work intoposition to be operated upon by the cutting mechanism.

The work-holding drum is made up of three parts, C being the drum partproper, the open 5o ends of which are closed by the companion diskplates D D, secured in place by the series of tap-bolts Z2. These disksor end plates are each provided with a hub extension a fitting thedrum-shaft, and are secured there to by the set'screws Z). These disk orend plates are provided with overhanging edges or inwardly-projectingflanges d, Figs. 1 and 6, which provide an annular recess or space 13between such overhanging edges and the adjacent surface of the drum.

The work-holding drum holds or carries the blanks cl to be convertedinto combs and which are arranged atintervals in a series of sections,each section being composed of a number of blanks. This drum is providedon its periphery with a number of ribs 14, which are disposed atintervals and arranged in pairs. These ribs are set in a diagonal planewith reference to the axis of rotation and pro ject outwardly from thesurface of the drum and engage with the corresponding diagonal grooves15, formed in the under side of the movable clam ping-plates 10, asshown in Figs. 5 and 6. One edge of these plates is partially cut awayfrom the outer side inwardly to provide a shoulder-bearing recess 17 forthe seating of the series of comb-blank groups or work 18. The adjacentedges of the workclamping plates are cut away from the inner sideoutwardly to form the offset 19 to permit of the edge part 20 not cutaway to slightly overlap the adjacent surface of the next clamping-plateand bear against the combblank sections on that side in looking them inplace for the operation of the cutting device. The series ofclamping-plates extend around the periphery of the drum and are allmovable or adjustable, excepting the stationary plate 21, Fig. 5, whichis rigidly secured to the drum by screws 22. A break or space 23 isprovided for between this stationary plate and the next movable plate ofthe series. The purpose of this break orspace, Figs. 2 and 5, whichextends clear across the surface of the drum, will be explained fartheralong.

The series of movable plates are forced into a clamping or lookingposition by means of the set-screws 24, which bear against one endthereof, and when turned inwardly impart a wedging action in clampingthe work in place by reason of the engaging diagonal. ribs and grooves.

The overhanging edges'of the drum end journal-bearings 29, which arebolted to the movable bearing-block 30, resting on the companionguide-bars 31, having their respective ends joined bycross-bars 32, asshown in Figs. 1 and 2. The guide-bars 31 are stationary as to anendwise movement and are rigidly mounted on the base bearing-block 33,having a; dovetailed engagement with the sta tionary bed-p1ate 34, asshown at 35, Fig. 2.

The movable or traveling bearing-block is provided on the under sidewith a downwardlyrprojecting part, forming a screw-nut 36,- engagingwith the endless feed-screw 37, having suitable bearings in the endcross-bars 32. This feature provides for an endwise movement of thebearing-block 30 and with it the arbor 2'7, carrying the tooth-cuttingsaw, and bringing the same into position with reference to the work andcutting the comb tooth by tooth. The endless feed-screw 37 has "a rotarybut not an endwise movement.

A toothed feed-wheel38'is mounted on the outer end of the feed-screw 37.A feed-arm 39is mounted on the drum-shaft, its outer disengaged endbeing in line with the toothed feed-wheel, as shown in Fig. 1. On theouter socket end of this arm, Fig. 12, is adj ustably inserted a feedfinger 40, which is adapted, once in each revolution of the work-holdingdrum, to come in contact with one of the teeth g ofthe feed-wheelandrotate the same a part of a revolution and pass on out of contact toengage the next tooth as the feed-arm comes aroundagain, and so on incontinuous succession. This intermittent movement is in turn transmittedto the feed-screw 37 and rotates'it' just far enough to impartan endwisemovement to the cutting mechanism and bring the same into position tocut the next tooth. The feed-finger 40 is adj ustably retained in thesocket end of the feed-arm 39 the face of the work-holding drum takesplace when the break or space 23 is coincident with This end of themachine is the saw-arbor.

intended for cutting the fine teeth which have to be backed up orsupported during the op eration; otherwise they are liable to be bentout of shape or broken off. The means employed for this purpose willbenext described.

A sleeve 42 is mounted on the arbor 27, which in turn has a sleeve 43.mounted on the outer end thereof, and is adjustable thereon withreference to the thickness of the teeth by a set-screw 44. A plate 45 isformed on the sleeve 43, Figs. 7, 8, and 9, and is adapted to fit intothe space between the teeth and-back of the tooth being cut and supportthe same, asshown in Fig. 8.

A-crank46, mounted on the outer end of the feed-screw, provides meansfor rotatin the same by hand. By means of the ban screw 47, inserted inthe base bearing-block 33,- the cutting mechanism maybe moved away fromor toward theword-holding drum.

48 is the driving-belt pulley mounted on the saw-arbor.

The coarse teeth of the combs are cut on theopposite end of the machine,nearly all the parts of'whioh are duplicates of the end described.

The cutting-saw 26 is mounted on the ar bor 28, which is provided withjournal-bearings 49, bolted to the movable or traveling bearing-block50, resting on the companion guide-bars 51. These guide-bars are'statiomary with reference to an endwise movement and are rigidly mounted on thebase bearing-i block 52, having a dovetailed engagement with thestationary bed-plate 34, as shownat 53, Fig. 2. The travelingbearing-block 50 is provided on the under side with adownwardly-projecting part, forming a screw nut 54, engaging withtheendless feed-screw 55, having its respective ends provided withsuitable bearings inthe cross-bars 56. By this arrangement thebearing-block 50 is adapted to have an endwise movement and carryingwith it the arbor 28 and the cutting-saw mounted thereon. A pinion 57 ismounted on the outer end of the feed-screw 55 and engageswithi a secondpinion 58, mounted ona stub-shaft 59, journaled in a hanger 60, suspended from the feed-screw 55. A toothed feed-wheel 61 is also mountedon the stubshaft. A feed-arm 62 is mounted on the drumshaft'in'line withthe feed-wheel 61, the outer disengaged end of which is adapted to havecontact with the teeth 63 of the feed-wheel once in each revolution andimpart a single impulse thereto, which movement is in turn transmittedtot-he feed-screw and the endwise movement of the cutting mechanismeffected. The outer socket end of this feedarm is provided with afeed-finger 64, longitudinally adjustable by means of a lockingset-screw 65. The construction,arrangement, and operation are preciselythe same as, the similar features and parts described in connection withthe opposite end of the machine, there being, however, this difference.In the last-described end of the machine two pin- IIO ions are usedbetween the feed-wheel and feed-screw for the purpose of changing thefeed as the speed is varied in cutting the fine and coarse teeth. Thebacking-plate, following the cutting-saw, is omitted in this end of themachine, as the coarse teeth do not require stay or support in theprocess of cutting.

A hand-screw 6G is inserted in the baseblock 52 and provides means formoving the cutting mechanism up to or away from the work. The crank 67,mounted on the end of the feed-screw 55, permits of the same beingrotated by hand in shifting the cutting mechanism.

The motive power is transmitted through the medium of the gear-wheel 68,mounted on the drum-shaft, and the pinion 69, engaging therewith.

In operation the companion feed-screws rotate in opposite directions incutting the teeth in both ends of the comb simultaneously, but eachcutting-saw working independently of the other, so that it is possibleto work one end of the machine without the other when necessary. In Fig.1 is illustrated the relative working position of the companioncutting-saws. The saw cutting the line teeth is set to begin at the endand cut to the middle. The saw cutting the coarse teeth begins at themiddle and cuts to the end-that is, the one saw advances while the otherrecedes. When the finished combs are taken out and the drum reloadedwith blank sections, the cutting mechanism is returned to its normal orstarting position by rotating the feed-screws by hand.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a combcutting machine, the combination with a rotatable shaft,supported in suitable bearings, of a work-holding drum, rigidly mountedthereon, and the companion carriages, carrying the cutting mechanism andtraversing the face of said drum in the same direction, that is, onecutter advancing as the other recedes, whereby the fine and coarse teethare cut simultaneously.

2. In a comb-cutting machine, the combination with a rotatable drumprovided on its periphery with a number of ribs set in a diagonal planewith reference to the axis of motion, the work'clamping plates, providedon their under side with corresponding diagonal grooves engaging saidribs, and means for moving said plates into a locking position.

3. In a comb-cutting machine, the combination with the driving-shaft, ofa work-holding drum, rigidly mounted thereon and consisting of the drumpart proper and the companion disk end plates, provided with hubextensions fitting said shaft and having the inwardly-turned overhangingedges, the series of ribs, set diagonally in the periphery of said drum,the clamping-plates, provided with corresponding diagonal groovesengaging said ribs, and the means substantially as described for movingsaid plates in to a lockin g position.

4. In a comb-cutting machine, the combination with the arbor 27, of therotary cutter, carried thereby, a sleeve, mounted on said arbor, asecond sleeve, having a plate formed thereon and adj ustably mounted onthe first sleeve, said plate being adapted to engage the back of thetooth being next cut.

In testimony whereof I affix my signature in presence of two witnesses.

HARVEY H. PREDMORE.

Witnesses L. M. FREEMAN, L. B. CQUPLAND.

